Add CI

.github/workflows/ci.yml

@@ -0,0 +1,36 @@
+name: PHP Composer
+on:
+  push:
+    branches:
+      - '*'
+  pull_request:
+    branches: [ "main" ]
+permissions:
+  contents: read
+jobs:
+  test:
+    strategy:
+      matrix:
+        php: [ 8.2, 8.3]
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - name: Setup PHP
+      uses: shivammathur/setup-php@v2
+      with:
+        php-version: ${{ matrix.php }}
+    - name: Validate composer.json and composer.lock
+      run: composer validate --strict
+    - name: Cache Composer packages
+      id: composer-cache
+      uses: actions/cache@v3
+      with:
+        path: vendor
+        key: ${{ runner.os }}-php-${{ hashFiles('**/composer.lock') }}
+        restore-keys: |
+          ${{ runner.os }}-php-${{ matrix.php }}
+    - name: Install dependencies
+      run: |
+        composer install --prefer-dist --no-progress
+    - name: Run test suite
+      run: composer run-script test